I grew up without those rollbars myself. Guess Pop figgered my gourd would withstand any impact I could put it thru. I originally was going to build it w/o the bars, but the wheels scaled out too large for the old style we're used to but just right for the off roader types they put out nowadaze. The fireplugs came from a box lot I bought a while back---a whole sprue of then so I've got plenty to build more. A roto-tiller is next up, then I'll see about chainsaws, weed wackers and maybe a portable generator.